随着电子计算机特别是微处理器和微型计算机的飞速发展,国外工业过程控制计算机的数量增长很快,应用范围迅速扩大。据估计到1978年底已超过50万台,从1960到1978年的年增长率大约为67％,而且还没有马上减慢的迹象。近几年来,工业过程控制的重点是最佳化 With the rapid development of electronic computers, especially microprocessors and microcomputers, the number of foreign industrial process control computers has grown rapidly and their applications have rapidly expanded. It is estimated that by the end of 1978 more than 500,000 units had been built, representing an annual growth rate of about 67% from 1960 to 1978, with no signs of any immediate slowdown. In recent years, the focus of industrial process control has been to optimize